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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#ifndef OSGDB_XML_PARSER
#define OSGDB_XML_PARSER 1
#include <osgDB/Registry>
namespace osgDB {
// forward declare
class XmlNode;
/** read an Xml file, find the file in Options DataFilePathList.*/
extern OSGDB_EXPORT XmlNode* readXmlFile(const std::string& filename,const Options* options);
/** read an Xml file, find the file in osgDB::Registry's eaderWriter::Options DataFilePathList.*/
inline XmlNode* readXmlFile(const std::string& filename)
{
return readXmlFile(filename, osgDB::Registry::instance()->getOptions());
}
/** read an Xml from from an istream.*/
extern OSGDB_EXPORT XmlNode* readXmlStream(std::istream& fin);
extern OSGDB_EXPORT std::string trimEnclosingSpaces(const std::string& str);
/** XmlNode class for very basic reading and writing of xml files.*/
class OSGDB_EXPORT XmlNode : public osg::Referenced
{
public:
XmlNode();
enum NodeType
{
UNASSIGNED,
ATOM,
NODE,
GROUP,
ROOT,
COMMENT,
INFORMATION
};
typedef std::map< std::string, std::string > Properties;
typedef std::vector< osg::ref_ptr<XmlNode> > Children;
NodeType type;
std::string name;
std::string contents;
Properties properties;
Children children;
std::string getTrimmedContents() const { return trimEnclosingSpaces(contents); }
public:
class OSGDB_EXPORT ControlMap
{
public:
ControlMap();
typedef std::map< std::string, int > ControlToCharacterMap;
typedef std::map< int, std::string> CharacterToControlMap;
void addControlToCharacter(const std::string& control, int c);
ControlToCharacterMap _controlToCharacterMap;
CharacterToControlMap _characterToControlMap;
private:
void setUpControlMappings();
};
class OSGDB_EXPORT Input : public ControlMap
{
public:
Input();
Input(const Input&);
~Input();
typedef std::string::size_type size_type;
void open(const std::string& filename);
void attach(std::istream& istream);
void readAllDataIntoBuffer();
operator bool () const { return _currentPos<_buffer.size(); }
size_type currentPosition() const { return _currentPos; }
int get() { if (_currentPos<_buffer.size()) return _buffer[_currentPos++]; else return -1; }
int operator [] (size_type i) const { if ((_currentPos+i)<_buffer.size()) return _buffer[_currentPos+i]; else return -1; }
void operator ++ () { if (_currentPos<_buffer.size()) ++_currentPos; }
void operator += (size_type n) { if ((_currentPos+n)<_buffer.size()) _currentPos+=n; else _currentPos = _buffer.size(); }
void skipWhiteSpace();
std::string substr(size_type pos, size_type n=std::string::npos) { return (_currentPos<_buffer.size()) ? _buffer.substr(_currentPos+pos,n) : std::string(); }
size_type find(const std::string& str)
{
if (_currentPos<_buffer.size())
{
size_type pos = _buffer.find(str, _currentPos);
if (pos==std::string::npos) return std::string::npos;
else return pos-_currentPos;
} else return std::string::npos;
}
bool match(const std::string& str) { return (_currentPos<_buffer.size()) ? _buffer.compare(_currentPos, str.size(), str)==0 : false; }
private:
size_type _currentPos;
std::ifstream _fin;
std::string _buffer;
};
bool read(Input& input);
bool write(std::ostream& fout, const std::string& indent = "") const;
bool write(const ControlMap& controlMap, std::ostream& fout, const std::string& indent = "") const;
bool writeString(const ControlMap& controlMap, std::ostream& fout, const std::string& str) const;
protected:
bool writeChildren(const ControlMap& controlMap, std::ostream& fout, const std::string& indent) const;
bool writeProperties(const ControlMap& controlMap, std::ostream& fout) const;
bool readAndReplaceControl(std::string& contents, Input& input);
};
}
#endif